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What will come in place of question mark...

What will come in place of question mark (?) in the following questions
`4 (4)/(5) + 2 (1)/(15) - (27)/(5) = 2 (1)/(5) div 3 xx ?`

A

`(2)/(9)`

B

1

C

2

D

3

Text Solution

AI Generated Solution

The correct Answer is:
To solve the equation \( 4 \frac{4}{5} + 2 \frac{1}{15} - \frac{27}{5} = 2 \frac{1}{5} \div 3 \times ? \), we will follow these steps: ### Step 1: Convert Mixed Numbers to Improper Fractions Convert \( 4 \frac{4}{5} \) and \( 2 \frac{1}{15} \) into improper fractions. - For \( 4 \frac{4}{5} \): \[ 4 \frac{4}{5} = \frac{4 \times 5 + 4}{5} = \frac{20 + 4}{5} = \frac{24}{5} \] - For \( 2 \frac{1}{15} \): \[ 2 \frac{1}{15} = \frac{2 \times 15 + 1}{15} = \frac{30 + 1}{15} = \frac{31}{15} \] - For \( 2 \frac{1}{5} \): \[ 2 \frac{1}{5} = \frac{2 \times 5 + 1}{5} = \frac{10 + 1}{5} = \frac{11}{5} \] ### Step 2: Rewrite the Equation Now, rewrite the equation using the improper fractions: \[ \frac{24}{5} + \frac{31}{15} - \frac{27}{5} = \frac{11}{5} \div 3 \times ? \] ### Step 3: Find a Common Denominator To add and subtract the fractions on the left side, we need a common denominator. The least common multiple (LCM) of 5 and 15 is 15. - Convert \( \frac{24}{5} \) to have a denominator of 15: \[ \frac{24}{5} = \frac{24 \times 3}{5 \times 3} = \frac{72}{15} \] - Convert \( \frac{27}{5} \) to have a denominator of 15: \[ \frac{27}{5} = \frac{27 \times 3}{5 \times 3} = \frac{81}{15} \] ### Step 4: Substitute and Simplify Now substitute back into the equation: \[ \frac{72}{15} + \frac{31}{15} - \frac{81}{15} = \frac{11}{5} \div 3 \times ? \] Combine the fractions on the left side: \[ \frac{72 + 31 - 81}{15} = \frac{22}{15} \] ### Step 5: Simplify the Right Side Now simplify the right side: \[ \frac{11}{5} \div 3 = \frac{11}{5} \times \frac{1}{3} = \frac{11}{15} \] Thus, the equation becomes: \[ \frac{22}{15} = \frac{11}{15} \times ? \] ### Step 6: Solve for ? To find \( ? \), we can multiply both sides by \( \frac{15}{11} \): \[ ? = \frac{22}{15} \times \frac{15}{11} = \frac{22}{11} = 2 \] ### Final Answer Therefore, the value that comes in place of the question mark (?) is: \[ \boxed{2} \]
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ADDA247-NUMBER SYSTEM, SIMPLIFICATION AND APPROXIMATION -PRELIMS QUESTIONS (LEVEL - 1)
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